Tagged: jit

When does JIT inline methods 0

When does JIT inline methods

The Hotspot JIT only inlines methods that are less than a certain (configurable) size. So using smaller methods allows more inlining, which is good. When running this code with the following JVM flags: -XX:+UnlockDiagnosticVMOptions...

Why does JIT not compile huge methods 0

Why does JIT not compile huge methods

I was wondering why the JVM’s JIT compiler ignores “huge methods” from compilation. (Unless the DontCompileHugeMethods flag is set to false) So here is the answer : Basically the ROI of compiling huge methods...

How to analyze code cache usage 0

How to analyze code cache usage

Code cache is a memory area separate from the JVM heap that contains all the JVM bytecode for a method compiled down to native code, each called an nmethod1. This is where the JIT...

How does JIT (just in time) compiler works 0

How does JIT (just in time) compiler works

JIT compilation does require processor time and memory usage. When the JVM first starts up,thousands of methods are called. Compiling all of these methods can significantly affect startup time,even if the program eventually achieves...